Home / 7,920.36-11,872.02-5,149.02

Finding the Fourth Proportional to 7,920.36, 11,872.02 and 5,149.02

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Solution

The fourth proportional to 7,920.36, 11,872.02 and 5,149.02 is: 7,717.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,920.36 : 11,872.02 = 5,149.02 : x
  2. Step 2: Convert to fraction form
    7,920.36/11,872.02 = 5,149.02/x
  3. Step 3: Cross multiply
    7,920.36x = 11,872.02 × 5,149.02
  4. Step 4: Simplify right side
    7,920.36x = 61,129,268.42
  5. Step 5: Solve for x
    x = 61,129,268.42/7,920.36
  6. Step 6: Final answer
    x = 7,717.99

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.